将颜色转换为十六进制c＃ [英] Translate color to hexadecimal c#

问题描述

我将转换颜色转换为十六进制的问题。红色下划线低于 System.Drawing.ColorTranslator.FromHtml（paint）和 rect.Color;
变量 paint 现在是静态的。

我认为问题出在变量类型public System.Drawing.SolidBrush Color at Rect class

 列表< Rect> rects = new List< Rect>（）; 
 rects.Add（new Rect（）
 {
 Width = x，
 Height = y，
 Left = w，
 Top = h，
 Fill =（System.Windows.Media.Brush）（new BrushConverter（））。ConvertFromString（paint）
}）; 
 
 foreach（rect rect rects）
 {
 Rectangle r = new Rectangle 
 {
 Width = rect.Width，
 Height = rect.Width，
 Fill = rect.Fill 
}; 
 Canvas.SetLeft（r，rect.Left）; 
 Canvas.SetTop（r，rect.Top）; 
 
 
 canvas.Children.Add（r）; 
 
} 
 
 
} 
 
 class Rect 
 {
 public int Width {get;组; } 
 public int Height {get;组; } 
 public int Left {get;组; } 
 public int Top {get;组; } 
 public System.Windows.Media.Brush Fill {get;组; } 
 
 
 $ b private void rectangle_Click（object sender，RoutedEventArgs e）
 {
选择r1 = new choose（）; 
 var paint =＃FFA669D1; 
 
 int x = int.Parse（beginx.Text）; 
 int y = int.Parse（beginy.Text）; 
 int w = int.Parse（wid.Text）; 
 int h = int.Parse（hei.Text）; （！> canvas.ActualWidth）||（y> canvas.ActualHeight）||（w> canvas.ActualWidth）||（h> canvas.ActualHeight）
 
 if（！ ））
 {
 r1.rectangle（x，y，w，h，paint，canvas）; 
 
 
 
 $ div $解析方案

不要为WPF Rectangle的 Fill 属性使用不兼容的WinForms类型 System.Drawing.SolidBrush 。使用 System.Windows.Media.Brush 改为：

  class Rect 
 {
 ... 
 public Brush Fill {get;组; } 
} 
  

然后使用WPF BrushConverter class将十六进制颜色字符串转换为Brush：

  rect.Fill =（Brush）（new BrushConverter（） ）.ConvertFromString（涂料）; 
  





---

在您的代码示例中，它应该看起来像这样：

  var converter = new BrushConverter（）; 
 
 rects.Add（新Rect 
 {
 Width = x，
 Height = y，
 Left = w，
 Top = h ，
 Fill =（Brush）converter.ConvertFromString（paint）
}）; 
 
 foreach（rect rect rects）
 {
 Rectangle r = new Rectangle 
 {
 Width = rect.Width，
 Height = rect.Width，
 Fill = rect.Fill 
}; 
 Canvas.SetLeft（r，rect.Left）; 
 Canvas.SetTop（r，rect.Top）; 
 canvas.Children.Add（r）; 
} 
  

I have problem with conversion color to hexadecimal. Red underline is below System.Drawing.ColorTranslator.FromHtml("paint") and rect.Color; Variable paint is static - for now.

In my opinion the problem is in variable's type public System.Drawing.SolidBrush Color at Rect class

 List<Rect> rects = new List<Rect>();
        rects.Add(new Rect()
        {
            Width = x,
            Height = y,
            Left = w,
            Top = h,
            Fill = (System.Windows.Media.Brush)(new BrushConverter()).ConvertFromString(paint)
        });

        foreach (Rect rect in rects)
        {
             Rectangle r = new Rectangle
             {
                 Width = rect.Width,
                 Height = rect.Width,
                 Fill = rect.Fill
             };
             Canvas.SetLeft(r, rect.Left);
            Canvas.SetTop(r, rect.Top);


            canvas.Children.Add(r);

        }


    }

class Rect
{
    public int Width { get; set; }
    public int Height { get; set; }
    public int Left { get; set; }
    public int Top { get; set; }
     public System.Windows.Media.Brush Fill { get; set; }
}


private void rectangle_Click(object sender, RoutedEventArgs e)
{
    choose r1 = new choose();
    var paint = "#FFA669D1";

    int x = int.Parse(beginx.Text);
    int y = int.Parse(beginy.Text);
    int w = int.Parse(wid.Text);
    int h = int.Parse(hei.Text);

    if (!((x > canvas.ActualWidth) || (y > canvas.ActualHeight) || (w > canvas.ActualWidth) || (h > canvas.ActualHeight)))
    {
        r1.rectangle(x, y, w, h, paint, canvas);
    }
}

解决方案

Do not use the incompatible WinForms type System.Drawing.SolidBrush for the Fill property of a WPF Rectangle. Use System.Windows.Media.Brush instead:

class Rect
{
    ...
    public Brush Fill { get; set; }
}

Then use the WPF BrushConverter class to convert a hexadecimal color string to a Brush:

rect.Fill = (Brush)(new BrushConverter()).ConvertFromString(paint);

---

In your code sample, it should look like this:

var converter = new BrushConverter();

rects.Add(new Rect
{
    Width = x,
    Height = y,
    Left = w,
    Top = h,
    Fill = (Brush)converter.ConvertFromString(paint)
});

foreach (Rect rect in rects)
{
    Rectangle r = new Rectangle
    {
        Width = rect.Width,
        Height = rect.Width,
        Fill = rect.Fill
    };
    Canvas.SetLeft(r, rect.Left);
    Canvas.SetTop(r, rect.Top);
    canvas.Children.Add(r);
}

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